Novel exact power loss design method for high output power density converter

Abstract

Novel exact circuit loss design method has been proposed to design high output power density converters employing a MOSFET and a Schottky Barrier Diode (SBD). The design method is based on a theoretically established minimum circuit loss estimation model for unipolar devices, which takes into account influences of device and circuit stray parameters on the circuit loss. Calculation process of the minimum circuit loss is described. To enhance the accuracy of the calculation data, data-tables of the nonlinear capacitance and transconductance of devices are utilized in the calculation. The data-tables are prepared by using measurement data or simulation data obtained with an exact device simulator. By using this circuit loss design method, exact circuit loss data and optimum circuit parameters to achieve the minimum circuit loss can be obtained.